Table 4.

Baseline characteristics of included PSCC in our institution.

Characteristics	Number
Age (median, range)	54.5 years (range: 39–80 years)
ER status
Positive	0
Negative	28 (100%)
PR status
Positive	1 (3.6%)
Negative	27 (96.4%)
HER-2 status
Positive	3 (10.7%)
Negative	25 (89.3%)
Ki-67 status
≥20%	26 (92.9%)
<20%	2 (7.1%)
Tumor size (median, range)	3 cm (range: 0.5–15 cm)
Adjuvant chemotherapy
Yes	25 (89.3%)
No	3 (10.7%)
Adjuvant radiotherapy
Yes	15 (53.6%)
No	13 (46.4%)
Types of PSCC
Pure	12 (42.9)
Mixed	16 (57.1%)
Tumor stage
T1	9 (32.1%)
T2	18 (64.3%)
T3	0
T4	1 (3.6%)
Nodal status
N0	22 (78.6%)
N1	5 (17.9%)
N2	1 (3.6%)
Treatment
LUMP + RT	8 (28.6%)
MAST only	13 (46.4%)
MAST + RT	7 (25%)

MAST, mastectomy; LUMP, lumpectomy; RT, radiotherapy; ER, estrogen receptor; PR, progesterone receptor.